I've been a USB tethering kind guy and I even left my jailbreak for a while in order to use the new personal hotspot feature in iOS 4.3 
I just paired my iPhone 4s Bluetooth to my MacBook Pro for the first time yesterday night (reason being is that I didnt want my iPhones WiFi address being shown to my apartment neighbors (i.e. Names iPhone))
20 minutes later, I noticed that there was 2 personal hotspot connections. I killed my Bluetooth connection and tried again 15 minutes later and lo and behold, another connection is established which I then gave up for the night and stuck with USB tethering.
Should I avoid using Bluetooth since someone is trying to use it?
I just paired my iPhone 4s Bluetooth to my MacBook Pro for the first time yesterday night (reason being is that I didnt want my iPhones WiFi address being shown to my apartment neighbors (i.e. Names iPhone))
20 minutes later, I noticed that there was 2 personal hotspot connections. I killed my Bluetooth connection and tried again 15 minutes later and lo and behold, another connection is established which I then gave up for the night and stuck with USB tethering.
Should I avoid using Bluetooth since someone is trying to use it?